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"Jessica would get really drunk and obnoxious, it was out of control," a source told Fox.

"She would be sprawled everywhere with her head on his lap and the look on Tony's face said it all," the source said. "He was so embarrassed in front of all the guys and his teammates were really harsh on him over it."

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The "Sweet Kisses" crooner, who starred on MTV with ex-husband Nick Lachey in the reality hit "Newlyweds," rose to fame as a baby-faced, virginal pop star who famously saved herself until marriage.

After her divorce from Lachey, who sang with pop band 98 Degrees, Simpson briefly dated John Mayer -- but eventually went back to her down-home roots when she set up shop with fellow Texan Romo.

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Simpson told Glamour magazine before she and Romo ended their relationship that no matter how long they stayed together, she would always love the football star.

"If this article comes out and we're not together, I'd still love [Tony], and he'd still be a huge part of who I am today," Simpson said in the magazine.